120results about How to "No radiation" patented technology

The invention provides a shape detection device and method based on a spiral FBG (fiber bragg grating) sensor array, and the device comprises the spiral FBG sensor array, an FBG demodulator, data collection and shape reconstruction equipment, and display equipment. The device does not need other peripheral auxiliary equipment, is not affected by electromagnetic interference, is good in medical compatibility, does not emit rays, and can achieve the long-distance remote monitoring. Through the spiral configuration of the FBG sensor array, the device can achieve the multi-point deformation detection of a single optical fiber, and forms a quasi-distributed detection system. Through the packaging of the optical fiber on a nickel-titanium alloy filament, the device protects a grating point from being worn, is strong in anti-interference capability, and enlarges the detection range. The device can obtain the shape of a flexible robot in real time, and is high in real-time response. Meanwhile, the device detects the curvature and torsion, is simple in detection method, can be used for the shape sensing detection in a gastroscope, colonoscope and a flexible / soft robot, and plays an important role in the flexible robots in the fields of dibaster assistance, medical rehabilitation and national defense security.

The invention discloses nanometer-anion functional interior-wall latex paint and a preparing method thereof. The interior-wall latex paint is prepared from, by weight, 120 parts to 150 parts of polymer emulsion, 3 parts to 5 parts of hydroxyethyl cellulose, 2 parts to 5 parts of water-soluble compound nanometer anion powder, 15 parts to 25 parts of antifreezing agents, 7 parts to 9 parts of film forming assistants, 3 parts to 6 parts of thickening agents, 3 parts to 5 parts of flatting agents, 180 parts to 220 parts of packing and 350 parts to 450 parts of water. According to the nanometer-anion functional interior-wall latex paint and the preparing method, as a formula structure is adjusted, and the water-soluble compound nanometer sterilizing powder is added, the interior-wall latex paint has the effects of continuously releasing anions, purifying air and improving body immunity, wherein the water-soluble compound nanometer anion powder is prepared in the mode that nanometer grinding is carried out on two or more kinds of crystals, quartz, vermiculite, medical stone and tourmaline. The interior-wall latex paint is environmentally friendly, efficient, safe, low in cost, high in practicability and broad in application prospect, energy is saved, and the anions can be efficiently released.

The present invention relates to a formula of colour artificial stone and its production process. its formula incldues (wt%) 10-20% of resin, 30-40% of colour cobblestone or colour stone powder, 20-30% of natural stone powder, 10-20% of filling material, 2-3% of hardening accelerator and 2-3% of adjuvant.

The invention belongs to the field of floor processing, in particular to a processing technique of noctilucent glazing floors. The processing technique is good in decoration and comprises the following steps of (1) processing a floor slab; (2) coating noctilucent primer on the floor slab processed in the step (1) to obtain a first floor slab; (3) coating elastic primer, wear-resisting primer and hardening primer on the first floor slab processed in the step (2) to obtain a second floor slab; and (4) coating glazing paint on the second floor slab processed in the step (3) to obtain the noctilucent glazing floors. The glazing paint is coated outside the noctilucent primer of the processed floors to enable the floors to give out full and soft light at night, simultaneously friction losses or oxidation of the noctilucent primer can be well avoided, weather resistance of the noctilucent primer is strengthened, and lighting service life of the noctilucent primer is prolonged. The glazing paint is applied to the surface of the floors, glossiness, abrasive resistance and fire resistance of the floors are strengthened, flame retardant efficiency of the floors is good, strength is high, and deformation caused by external temperature and humidity is not easy to cause.

An UV curing luminescent panel consists of a luminescent layer and a reflective layer. The luminescent layer with the thickness of 0.02-5.0mm consists of light-cured resin (10-40 percent of resins such as epoxy acrylic resin, polyurethane acrylic resin, polyester acrylic resin and the like), photosensitive diluent (photosensitive diluent is 10-20 percent of resins of ethoxylated acrylic ester, propoxylated neopentyl glycol diacrylate, TMPTA and the like), photoinitiator (2-10 percent of beans development kit BDK and the like), luminescent materials (10-65 percent) and additive (0-5 percent). The UV curing luminescent panel has the advantages of no solvent emission, saving energy due to instant drying of UV curing, high production efficiency due to on-line processing, and being applicable to base materials sensitive to heat; furthermore, the prepared luminescent panel is characterized by high brightness, long luminescent time, excellent acid and alkali resistance and weatherability, good printing performance, non-toxicity, no radiation and stable physicochemical performance.

The invention discloses emulsion of a water-based primer for EVA materials. The emulsion is prepared from the following raw materials of hydroxyl terminated polyolefin, dihydroxymethyl carboxylic acid, aliphatic diisocyanate, a catalyst, a solvent, triethylamine, deionized water and an amine-type chain extender. The invention also discloses a method for preparing the emulsion. The method comprises five steps of preparation of raw materials, polyreaction, salt forming reaction, emulsifying chain extension and synthesis, is simple and easy for implementation, has low requirements on equipment and can realize industrialized production easily; the emission of volatile organic matters is avoided, which benefits environmental protection and health of operators; UV radiation is unavailable, the emulsion is easy to use, and the preparation method is simple and practical; the emulsion has strong affinity to the EVA materials and is quite compatible with other binders; and the EVA materials treated by the EVA water-based primer provided by the invention can be bonded by various binders, and the bonding strength is quite high.

The invention discloses a light-weight aggregate shale ceramic particle and a production method thereof, which includes powdered argillaceous shale, pulverized fuel ash, additive and water; the ratio of the ingredients is that: 15-90 parts of powdered argillaceous shale, 5-60 parts of pulverized fuel ash, 1-12 parts of additive and 4-15 parts of water. The production method includes the conventional collection of argillaceous shale and the crashing process, besides, the invention also comprises the following steps: (1)screening; (2) the mixing materials is prepared; (3) the mixing material is added into a marble machine so as to produce raw meal pellets and is discharged; (4) the raw meal pellets are fed into a multi-cylinder rotary kiln for drying and sintering and finally the shale ceramic particles are formed; (5) the products of shale ceramic particles, ceramic sand and ceramic block can be obtained after the cooling and the sizing screening process by a trommel screen. The product is sintered in a multi-cylinder rotary kiln at temperature of 1150-1200 DEG C and the material property is changed and is sound-insulating, light in weight, shock-resistant, weather-resistant, and corrosion-resistant, has distinct energy-saving effect and is beneficial to generalization and implementation.

The invention discloses a three-dimensional force-sensing surgical needle for minimally invasive surgery. The needle comprises a minimally invasive surgery needle, the minimally invasive surgery needle comprises a medical surgery needle head which is fixedly connected to a thin hose and used for injecting and sucking a liquid or a medicine and a hollow metal tube which is connected to the medicalsurgery needle head, and three fiber grating sensors are evenly distributed on the outer surface of the hollow metal tube in the 120-degree axial direction in the circumferential direction; a fiber grating demodulator is connected to the fiber grating sensors, emits laser to the fiber grating sensors, receives laser signals with a specific wavelength returned by the fiber grating sensors, convertsthe laser signals into digital electric signals and demodulates the wavelength corresponding to each grating point; and a data acquisition and force decoupling calculation device receives the wavelength corresponding to each grating area sent by the fiber grating demodulator and performs analysis and calculation so as to obtain stress information of the front end of the minimally invasive surgeryneedle in real time, wherein the stress information is displayed by a display device in real time. The surgical needle is used for detecting the operation force in the operation process in real time.

The invention relates to environmental-friendly type energy-saving LED (Light Emitting Diode)-UV (Ultraviolet) silk-screen printing ink. The environmental-friendly type energy-saving LED-UV silk-screen printing ink is prepared from the following raw materials in parts by weight: 51 to 58 parts of acrylate prepolymer, 15 to 19 parts of reaction monomers, 12 to 15 parts of pigment, 1 to 4 parts of dispersing agent, 0 to 5 parts of filling agent, 7 to 10 parts of photosensitizer and 0 to 1 part of polymerization inhibitor. The environmental-friendly type energy-saving LED-UV silk-screen printing ink is solidified and dried through a UV-LED light source. The environmental-friendly type energy-saving LED-UV silk-screen printing ink disclosed by the invention contains no poisonous substances, cannot generate ozone, has no odor and contains no benzenes and aromatic organic solvents, a light resisting membrane is nonflammable and cannot deform, the contact temperature is below 70 DEG C, drying is fast, solidification and cross linking can be realized within 2 to 3 seconds, the fastness of a printing product is good, and no radiation light is generated; the environmental-friendly type energy-saving LED-UV silk-screen printing ink can be used for food packaging and metal printing of a medicine packaging machine and is safer and more environmental-friendly.

The invention discloses an ultrasonic probe of bone-ore density, which consists of detecting probe and two directional probes, wherein the detecting probe and directional probe are composed of case, delaying block in the case, wafer, acoustic layer, copper foil and adsorbing block. The invention can meter the spreading time and speed in the bone, which is relative to bone-ore to judge bone quality.

The invention discloses a bowlder-imitated artificial stone plate and a manufacturing method thereof. The artificial stone plate comprises the following components in percentage by mass: 28-30% of unsaturated polyester resin, 40-65% of aluminum hydroxide, 5-30% of shells crushed into objects with diameters of 1-5 cm, 0.02-0.04% of cobalt naphthenate, 0.03-0.05% of methyl ethyl ketone peroxide and 1-2% of pigment paste. The bowlder-imitated artificial stone plate disclosed by the invention has the advantages that: the bowlder-imitated artificial stone plate is environmental-friendly, non-toxic and non-radiative; products are diversiform in color, bright in color and translucent; and the bowlder-imitated artificial stone plate can be produced according to various needs of customers, so that the stone plate is agile and changeable and convenient to decorate and collocate, thereby creating colorful life spaces. Compared with ceramic tiles, the product is light in weight and can be arbitrarily cut and processed; and the bowlder-imitated artificial stone plate has various thicknesses, so that the applicable range of the stone plate is wider than that of ceramic tiles in decoration. The production method disclosed by the invention is simple in process and safe and convenient in production, and a produced artificial stone plate has a smooth and non-porous surface, and a situation that dirt infiltrates into the plate does not occur in the process of application, so that the application of the artificial stone plate is cleaner and more sanitary.

The present invention is application of allochromatic silica gel for absorbing moisture and deodorizing in refrigerator and household environment. The allochromatic silica gel in saturated adsorption state and unsaturated adsorption state has different colors, and may be regenerated through heating in a microwave oven at the temperature not over 110 deg.c, preferably in 105 deg.c. It has high adsorption capacity, high moisture absorbing and deodorizing effect, reuseability, simple regenerating process, no toxicity, no radioactivity and other advantages.

The invention relates to the technical field of tools for medical teaching, in particular to a CT simulation system for teaching. The CT simulation system for teaching is suitable for teaching demonstration, free of radiation and harm, easy to operate and good in simulation effect and can simulate operation and output and display human body scanning information. The system comprises a simulation platform assembly, a simulation scanning frame assembly arranged outside the simulation platform assembly in a sleeving mode, a human body model arranged above the simulation platform assembly, a data storage and processing assembly used for receiving, processing and sending data, a control assembly and a display assembly, wherein the control assembly and the display assembly are connected with the data storage and processing assembly through cables. The CT simulation system for teaching has the advantages of being simple and reasonable in structure, low in manufacturing cost, suitable for purchase and use of schools, suitable for teaching demonstration, free of radiation and harm, easy to operate, good in simulation effect and capable of simulating operation and outputting and displaying the human body scanning information.

The invention relates to an underwater carrier geomagnetic three-component measuring method. A geomagnetic three-component value of a point without a magnetic anomaly is measured by making a nonmagnetic carrier carry a three-component magnetometer in a known area; then, a pair of three-component magnetometers is carried by a magnetic carrier, relevant parameters of sensor locations are obtained through solution; next, magnetic field three-component values with interference in an unknown area are measured according to measuring lines; an external interfering magnetic field is removed through difference, and an underwater geomagnetic vector diagram is drawn according to the obtained geomagnetic field three-component values in the unknown area. Compared with the method of satellite measurement or water surface measurement downward continuation, underwater geomagnetic field data obtained through the underwater carrier geomagnetic three-component measuring method are more reliable and more authentic, the underwater carrier geomagnetic three-component measuring method accords with geomagnetic characteristics of underwater on-site environments, and the measurement data are valid for a long time. The geomagnetic field three-component measurement accuracy is improved, the anti-jamming capability is enhanced, and accurate geomagnetic three-component measurement of an underwater carrier is realized. The underwater carrier geomagnetic three-component measuring method is applicable to compensation for influences of a ground carrier, an aerial carrier and the underwater carrier on geomagnetic field component measurement, in particular to geomagnetic navigation of the carriers.

The invention discloses a preparation method of a luminous decorative plate. The preparation method comprises the following steps: 1) preparing material: water-based luminous ink is prepared by the following raw materials in percentage by weight: a material A composed of 5-20% of water-based acrylic resin, 8-20% of luminous powder, 0.5-2% of a dispersant, 0.2-0.5% of a defoaming agent and 15-20% of tap water, a material B composed of 10-20% of a casein solution, 0.3-0.5% of a defoaming agent, 0.5-2% of an anti-settling agent, 5-10% of ethanol, 2-5% of propylene glycol, 20-40% of tap water and 1-2% of a leveling wetting agent and a material C composed of 0.5-2% of a thickening agent and 0.5-1% of a pH value regulator; 2) printing; 3) dipping; 4) pressing, so as to obtain the luminous decorative plate. The luminous decorative plate prepared through the method provided by the invention has the effect of environmental protection and a long-term luminous function, and further has the characteristics of light fastness, scratch resistance, wear resistance, and natural and vivid texture.

The invention discloses nanometer negative ion functional water-based wood paint and a preparation method thereof. The nanometer negative ion functional water-based wood paint is prepared from, by weight, 60-85 parts of aliphatic modified polyurethane dispersions, 0.3-0.8 part of water-soluble composite nanometer negative ion powder, 1-3 parts of hardening resin, 7-12 parts of water, 1-3 parts of wax emulsion and 4-12 parts of other auxiliaries. The physicochemical technical indexes of the water-based wood paint can reach or exceed those of oil-based wood paint through formula adjustment in cooperation with function materials; negative ions can be lastingly and efficiently released regardless of the small addition amount of the negative ion powder, so that air is purified, human body immunity is improved, and the water-based wood paint is environmentally friendly, free of toxicity, excellent in overall performance and high in practicality and has broad application prospects.

The invention discloses a high-intensity self-heat preservation hollow wall board and a manufacture method thereof. The existing heat preservation wall board is mainly characterized by compound heat preservation; a board material mainly takes a cement slag benzene-sandwiched board, is mostly used as an indoor partition wall board when being applied to a construction wall, and can not be used as an outer wall bearing board. The compositions of the high-intensity self-heat preservation hollow wall board are as follows: plant fiber powder, innoxious bond, additive, and firming agent; the weight portions thereof are as follows: 35 to 60 portions of plant fiber powder, 0.5 to 20 portions of innoxious bond, 10 to 25 portions of additive, as well as 0.1 to 5 portions of firming agent. The invention is used for the heat preservation wall board used for construction and a manufacture method.

The invention discloses energy-saving paint and a preparation method thereof. The energy-saving paint comprises the following components of cellulose, 2-amino-2-methyl-1-propanol-95 (AMP-95), a temperature-regulating, phase-changing, energy-storing and heat-preserving material, pure acrylic emulsion, a dispersing agent, a wetting agent, a defoaming agent, rutile titanium dioxide, glycol, a film forming aid, a preservative, a mildew prevention agent, a flattening agent, a thickening agent and deionized water. According to the energy-saving paint, the novel temperature-regulating, phase-changing, energy-storing and heat-preserving material is adopted, so that effects of saving energy by using latent heat, storing and releasing heat energy and making the room temperature be relatively balanced are achieved; and the energy-saving paint has sound absorbing, noise lowering, sterilizing, toxicity preventing, odor removing and fire and mildew preventing functions, and alkali can be prevented from being separated out.

The invention discloses a biological red brick and a manufacturing method thereof. The biological red brick is prepared from crushed shale or / and clay, water and crushed dry biomass powder which serve as green brick raw materials in a weight ratio of 1:0.08-0.15:0.04-0.07. The biological red brick is prepared by the steps of: processing raw materials to form a green brick, and then allowing the green brick to enter a brick kiln and sintering. The invention has the advantages that: 1, energy is saved; 2, influence on the environment during production is small; 3, clean environment is facilitated; 4, the product has good quality, long service life, and does not harm a human body; and 5, the cost is low.

The invention discloses a curtain type wind power and vibration power generator. The curtain type wind power and vibration power generator comprises a permanent magnet, a cavity, a coil and the like. The curtain type wind power and vibration power generator is novel in structure and has a shape similar to an ordinary curtain, can use wind power, water power, vibration power and the like to generate electricity, and can further be used as a substitute for a traditional curtain and a traditional door curtain.

The air purifier includes exhaust fan, air conveying pipeline inside the exhaust fan and with one end connected to the air inlet of the exhaust fan and the other end to the outlet of the exhaust fan, ten stages of air purifying ponds with air purifying material connected successively to the air conveying pipeline. The air purifier of the present invention can kill bacteria and virus in the air effectively and eliminate bad smell, and the purifying material adopted is non-toxic, radiation-free, safe and reliable. The air purifier is suitable for air purification in household, hotel, hospital, office building, factory, etc.

The invention discloses a method and a device for removing electromagnetic induction type metallic surface coating. The scheme adopted by the invention is that high-frequency current generates an induction magnetic field and a current vortex on a metallic surface via an electromagnetic induction coil, and further a coating is separated from the metallic surface under an appropriate temperature. The device comprises an induction power supply main frame (1), a relay power supply submachine (2), a hand-held sensor (3) and a removable induction head (4), and has the advantages of high speed, low energy consumption, no noise, no dust, no smoke, radiation prevention, discharge prevention, obsolete abrasiveness and sewage prevention, cleanness and safety, can removes the coasting difficult to be processed and on the surface of metal (in particular magnetic metal), can be widely suitable for coating removing operation of ships, storage grooves / cabinets / boxes, and various steel surfaces of coastwise and terrestrial oil conveying pipes.

The invention discloses an EVA treating agent which is prepared from the following components in parts by mass: 1 to 3 parts of SBS, 5 to 10 parts of EVA-265, 2 to 5 parts of maleic anhydride, 0.2 to 0.5 part of dibenzoyl peroxide, 0.5 to 1 part of cross-linking agent, 0.5 to 1 part of hydroxyethyl methylacrylate, 8 to 15 parts of methyl methacrylate, 5 to 10 parts of methyl cyclohexane, 10 to 15 parts of cyclohexane, 20 to 25 parts of butanone, 10 to 15 parts of dimethyl carbonate, 20 to 25 parts of ethyl acetate, 0.1 to 0.3 part of anti-aging agent, 0.5 to 1 part of chlorinated polyethylene, 0.5 to 1 part of chlorinated rubber and 2 to 5 parts of butylated hydroxytoluene. The invention also discloses a preparation method of the EVA treating agent. The obtained EVA treating agent is good in yellowing resistance, good in weather resistance, free of roughing and irradiation, better in permeability and better in aging resistance.

The invention discloses a curing agent for salinized sludge to achieve soil hardening and applications thereof. The curing agent is prepared by mixing high aluminum cement, calcium carbonate, talcum powder, a water reducer, lime, a sulfur-containing mixture, and a condensate namely sodium salts of beta-sulfonated naphthalene-formaldehyde. The curing agent is fully mixed with salinized soil to carry out reactions, then pressing the soil, and then the soil is subjected to maintenance for 7 to 28 days so as to complete the modification hardening. After the soil is cured by the curing agent, the unconfined compressive strength of the salinized soil can reach 7.9 MPa, far from the lowest standard of 3.2 MPa, and moreover the strength lifting space is very big and can reach 9 to 10 MPa. At the same time the cured soil shows prominent uniqueness and excellence in performances such as water stability, anti-corrosion property, and high strength resistant property. The curing agent can carry out hardening treatment on salinized soils on site, solves the hardening problem of high salt content soil in salt fields, seaside, and the like, and has very big economic and social profits.

The invention belongs to the technical field of biochemical analysis and particularly relates to a hyperpolarization <129>Xe switch type magnetic resonance molecular probe for identifying diamine oxidase. The hyperpolarization <129>Xe switch type magnetic resonance molecular probe comprises cucurbit[6]uril and putrescine hydrochloride. The principle of the molecular probe is characterized in thata substrate (putrescine hydrochloride) with high cucurbit[6]uril binding force is converted by diamine oxidase into a product (1-pyrroline) which does not combine with cucurbit[6]uril; before enzymatic reaction, a <129>Xe hyperpolarization chemical exchange saturation transfer signal in the cucurbit[6]uril is inhibited by strong cucurbit[6]uril conjugate until the enzymatic reaction oxidizes the substrate into the product; due to the fact that the binding constant of putrescine hydrochloride@cucurbit[6]uril is several magnitude orders larger than that of <129>Xe@cucurbit[6]uril and (1-pyrroline)@cucurbit[6]uril cannot combine, the <129>Xe hyperpolarization chemical exchange saturation transfer signal in the cucurbit[6]uril appears after the enzymatic reaction through enhanced <129>Xe cucurbit[6]uril interaction, and diamine oxidase identification is achieved through the <129>Xe hyperpolarization chemical exchange saturation transfer signal in the cucurbit[6]uril.

The invention discloses a method and system for checking the loading compliance of a fresh agricultural product transport vehicle. According to the method and system, the theoretical density thresholdvalue of a fresh agricultural product cargo loaded on a to-be-checked vehicle is calculated according to the theoretical density determination models of fresh agricultural products; the theoretical weight threshold value of the compartment front load-bearing axle group of the to-be-checked vehicle loaded with the fresh agricultural product cargo is calculated according to the theoretical weight determination model of the compartment front load-bearing axle group of the to-be-checked vehicle; whether the actual density of the fresh agricultural product cargo loaded by the to-be-checked vehicleis within a theoretical density threshold range or not is judged according to a calculation result, and whether the actual weight of the compartment front load-bearing axle group of the to-be-checkedvehicle is within a theoretical weight threshold range is judged according to a calculation result; and when the actual density is within the theoretical density threshold range, and when the actualweight is within the theoretical weight threshold range, valid loading is carried out. With the method and system of the invention adopted, the frequency of opening the compartment of the vehicle andchecking the cargo by an inspector is reduced, the accuracy of the checking of the illegal loading of the fresh agricultural product transport vehicle is improved, and the working intensity of the inspector is reduced.

The invention discloses an intelligent control magnetic field full coverage wireless charging desk comprising a desk body. A glass plate is embedded into one side of a desk top laid on the desk body, and a liquid crystal display is embedded into the other side. A transmitting coil is installed in a drawer below the desk top. A transmitting module and a single chip microcomputer connected with each other are arranged on a partition plate below the drawer. A power line is embedded into the desk top, the input end of the power line is hidden in the edge of the desk body, and the output end of the power line is connected with the transmitting module. A power supply method of the wireless charging desk is further provided. The wireless charging desk of the invention carries out charging by means of magnetic coupling resonance, is safe and non-radioactive, and reduces the risk of electric shock. The working state of the transmitting coil is controlled intelligently, and the power consumption is reduced. The wireless charging desk is universal and portable. The transmission of power is independent of the charging interface of equipment, and power supply and charging are more convenient. There is no conductive contact exposed. The desk top is clean and neat, and green and beautiful, and creates a good vision. The space of the table desk is saved fully.

The invention discloses a method for preparing surface functionalized polymer microspheres, which is characterized by comprising the following steps of: 1) adding an initiator and a disperser into a solvent, and fully dispersing to obtain a solution; 2) adding functional monomer into the solution obtained in the step 1), and fully dispersing to obtain a solution; and 3) irradiating the solution obtained in the step 2) by using ultraviolet, initiating reaction, obtaining emulsion after the reaction is finished, separating the emulsion, removing supernate, and washing to obtain the surface functionalized polymer microspheres. The preparation method has the advantages that: the generated heat is a little, an additional cooling device is not needed, the operation is simple and convenient, equipment is simple, radiation on a human body is absent basically, and the operation is safe. The prepared microspheres have uniform grain size, have functional groups on the surfaces, and can be used for inducing and synthesizing monodisperse semiconductor nanoparticles such as CdS, ZnS and the like.

The invention relates to a trivalent bismuth ion doped yttrium-lutetium-gallium-aluminum garnet ultraviolet long-afterglow luminescent material and a preparation method thereof. The base composition of the luminescent material is (Y<1-x>Lu<x>)<3>(Ga<1-y>Al<y>)<5>O<12>:zBi<3+>, wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, and z is greater than or equal to 0.001 and less than or equal to 0.1. The invention also provides a preparation method of the ultraviolet long-afterglow luminescent material. The preparation method comprises the following steps: weighing oxide raw materials according to a stoichiometric ratio, carrying out grinding and mixing, carrying out low-temperature pre-sintering on the obtained powder, then carrying out tabletting on the pre-sintered powder material, and finally carrying out high-temperature sintering to prepare the ultraviolet long-afterglow luminescent material. The prepared material can generate medium-wave ultraviolet emission when being irradiated by ultraviolet with a wavelength smaller than 290 nm, and after the light source is moved away, the material can still generate continuous ultraviolet luminescence, wherein the luminescence peak value is in a range of 300-320 nm, and the luminescence lasting time is greater than 1 hour. The ultraviolet long-afterglow luminescent material has a good application prospect in the fields of photocatalysis, disinfection and sterilization, anti-counterfeiting, medical photodynamic therapy and the like.